Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet (Detail) - Fair Value, Inputs, Level 2 $ in Thousands	Sep. 30, 2015 USD ($)
Currency Related Swap | Not a Hedge
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	$ (9,773)
Liability Derivatives, Fair value	(9,773)
Currency Related Swap | Not a Hedge | Current Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(3,832)
Currency Related Swap | Not a Hedge | Noncurrent Liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives, Fair value	(5,941)
Foreign Currency Derivatives | Not a Hedge
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	2,913
Asset Derivatives, Fair Value, Total	4,203
Liability Derivatives, Fair value	(1,290)
Foreign Currency Derivatives | Not a Hedge | Current Assets
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	1,510
Asset Derivatives, Fair Value, Total	1,510
Foreign Currency Derivatives | Not a Hedge | Non-current Assets
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	2,647
Asset Derivatives, Fair Value, Total	2,647
Foreign Currency Derivatives | Cash Flow Hedge | Current Liabilities
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	(1,244)
Liability Derivatives, Fair value	(1,290)
Foreign Currency Derivatives | Cash Flow Hedge | Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value, Total	46
Commodity Derivatives | Cash Flow Hedge | Current Liabilities
Derivatives Fair Value [Line Items]
Net Asset/(Liabilities)	(421)
Liability Derivatives, Fair value	$ (421)